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CVE-2007-4559 Patch #1

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CVE-2007-4559 Patch #1

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21 changes: 20 additions & 1 deletion recipes/recipe_modules/gitiles/resources/gerrit_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -184,7 +184,26 @@ def _extract_member(tarinfo, targetpath):
ret['extracted']['bytes'] += tarinfo.size
return em(tarinfo, targetpath)
tf._extract_member = _extract_member
tf.extractall(args.extract_to)
def is_within_directory(directory, target):

abs_directory = os.path.abspath(directory)
abs_target = os.path.abspath(target)

prefix = os.path.commonprefix([abs_directory, abs_target])

return prefix == abs_directory

def safe_extract(tar, path=".", members=None, *, numeric_owner=False):

for member in tar.getmembers():
member_path = os.path.join(path, member.name)
if not is_within_directory(path, member_path):
raise Exception("Attempted Path Traversal in Tar File")

tar.extractall(path, members, numeric_owner=numeric_owner)


safe_extract(tf, args.extract_to)
return ret

if args.log_start:
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